# [−][src]Struct cortex_m::peripheral::SYST

    pub struct SYST { /* fields omitted */ }

SysTick: System Timer

## Methods

### `impl SYST`[src]

#### `pub fn clear_current(&mut self)`[src]

Clears current value to 0

After calling `clear_current()`, the next call to `has_wrapped()` will return `false`.

#### `pub fn disable_counter(&mut self)`[src]

Disables counter

#### `pub fn disable_interrupt(&mut self)`[src]

Disables SysTick interrupt

#### `pub fn enable_counter(&mut self)`[src]

Enables counter

NOTE The reference manual indicates that:

"The SysTick counter reload and current value are undefined at reset, the correct initialization sequence for the SysTick counter is:

- Program reload value
- Clear current value
- Program Control and Status register"

The sequence translates to `self.set_reload(x); self.clear_current(); self.enable_counter()`

#### `pub fn enable_interrupt(&mut self)`[src]

Enables SysTick interrupt

#### `pub fn get_clock_source(&mut self) -> SystClkSource`[src]

Gets clock source

NOTE This takes `&mut self` because the read operation is side effectful and can clear the bit that indicates that the timer has wrapped (cf. `SYST.has_wrapped`)

#### `pub fn get_current() -> u32`[src]

Gets current value

#### `pub fn get_reload() -> u32`[src]

Gets reload value

#### `pub fn get_ticks_per_10ms() -> u32`[src]

Returns the reload value with which the counter would wrap once per 10 ms

Returns `0` if the value is not known (e.g. because the clock can change dynamically).

#### `pub fn has_reference_clock() -> bool`[src]

Checks if an external reference clock is available

#### `pub fn has_wrapped(&mut self) -> bool`[src]

Checks if the counter wrapped (underflowed) since the last check

NOTE This takes `&mut self` because the read operation is side effectful and will clear the bit of the read register.

#### `pub fn is_counter_enabled(&mut self) -> bool`[src]

Checks if counter is enabled

NOTE This takes `&mut self` because the read operation is side effectful and can clear the bit that indicates that the timer has wrapped (cf. `SYST.has_wrapped`)

#### `pub fn is_interrupt_enabled(&mut self) -> bool`[src]

Checks if SysTick interrupt is enabled

NOTE This takes `&mut self` because the read operation is side effectful and can clear the bit that indicates that the timer has wrapped (cf. `SYST.has_wrapped`)

#### `pub fn is_precise() -> bool`[src]

Checks if the calibration value is precise

Returns `false` if using the reload value returned by `get_ticks_per_10ms()` may result in a period significantly deviating from 10 ms.

#### `pub fn set_clock_source(&mut self, clk_source: SystClkSource)`[src]

Sets clock source

#### `pub fn set_reload(&mut self, value: u32)`[src]

Sets reload value

Valid values are between `1` and `0x00ffffff`.

NOTE To make the timer wrap every `N` ticks set the reload value to `N - 1`

### `impl SYST`[src]

#### `pub fn ptr() -> *const RegisterBlock`[src]

Returns a pointer to the register block

## Trait Implementations

### `impl Deref for SYST`[src]

#### `type Target = RegisterBlock`

The resulting type after dereferencing.

#### `fn deref(&self) -> &Self::Target`[src]

Dereferences the value.

### `impl Send for SYST`[src]

## Auto Trait Implementations

### `impl !Sync for SYST`

## Blanket Implementations

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`[src]

Performs the conversion.

### `impl<T> From<T> for T`[src]

#### `fn from(t: T) -> T`[src]

Performs the conversion.

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `fn into(self) -> U`[src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

#### `type Error = <U as TryFrom<T>>::Error`

The type returned in the event of a conversion error.

#### `fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`[src]

Performs the conversion.

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `fn borrow(&self) -> &T`[src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `fn borrow_mut(&mut self) -> &mut T`[src]

Mutably borrows from an owned value. Read more

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `fn type_id(&self) -> TypeId`[src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Same<T> for T`[src]

#### `type Output = T`

Should always be `Self`

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